The Proteome Is Much More Complicated Than the Genome, Not

The proteome is much more complicated than the genome, not only because of RNA splicing, proteolytic processing, post-translational modifications, conformational variants, and other protein variants that the authors mention, but also because of

A) how proteins are degraded.
B) what happens to proteins after they are degraded.
C) how the raw materials (i.e., amino acids) are reused.
D) how proteins are carried around the cell(s) or body.
E) when proteins are expressed, and whether it is constitutively or in response to some signal.